CN215704817U

CN215704817U - Composite corrugated paper

Info

Publication number: CN215704817U
Application number: CN202121186778.8U
Authority: CN
Inventors: 李龙龙
Original assignee: Nine Dragon Intelligent Packaging Dongguan Co ltd
Current assignee: Nine Dragon Intelligent Packaging Dongguan Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-02-01
Anticipated expiration: 2031-05-28

Abstract

The utility model particularly relates to composite corrugated paper which comprises an inner paper layer, wherein a first corrugated medium paper layer is arranged on the lower surface of the inner paper layer, and the longitudinal section of the first corrugated medium paper layer is wavy; the interior paper layer is bonded with the wave crest of the first corrugated medium paper layer, the lower surface of the first corrugated medium layer is provided with a sandwich composite board, the wave trough of the first corrugated medium layer is connected with the upper surface of the sandwich composite board, the lower surface of the sandwich composite board is provided with a foam heat insulation layer, the lower surface of the foam heat insulation layer is provided with a fiber reinforced layer, the lower surface of the fiber reinforced layer is provided with a second corrugated medium paper layer, the lower surface of the second corrugated medium paper layer is connected with a surface paper layer, and the upper surface of the interior paper layer and the lower surface of the surface paper layer are coated with waterproof coatings. The composite corrugated paper has the characteristics of high compressive resistance, strong buffering capacity, heat preservation and insulation and good waterproof effect.

Description

Composite corrugated paper

Technical Field

The utility model relates to the technical field of corrugated paper, in particular to composite corrugated paper.

Background

With the coming of policies related to the plastic-limiting command and the limitation and even prohibition of non-degradable plastic products, the market demand for manufacturing regenerated and easily-degradable paper packages and paper substitutes by using waste paper is increased, and the newly increased demand for replacing plastic or woven packaging bags in the express industry by corrugated cartons is extremely large. Due to the diversification of commodities and the need for transportation, the functional requirements for corrugated boxes are increasing. For example, bottled and canned goods require the corrugated case to have good buffering capacity, compressive strength and water resistance, and chilled and frozen goods require the corrugated case to have good water resistance, heat preservation and heat insulation performance and the like. However, most of corrugated paper used for manufacturing corrugated paper boxes in the market at present does not have the performance, and the existing corrugated paper needs to be structurally modified to meet the newly added requirement of the market.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model aims to provide the composite corrugated paper which has high pressure resistance, strong buffering capacity, heat preservation and insulation and good waterproof effect.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the composite corrugated paper comprises an inner paper layer, wherein a first corrugated medium paper layer is arranged on the lower surface of the inner paper layer, and the longitudinal section of the first corrugated medium paper layer is wavy; the interior paper layer is bonded with the wave crest of the first corrugated medium paper layer, the lower surface of the first corrugated medium layer is provided with a sandwich composite board, the wave trough of the first corrugated medium layer is connected with the upper surface of the sandwich composite board, the lower surface of the sandwich composite board is provided with a foam heat insulation layer, the lower surface of the foam heat insulation layer is provided with a fiber reinforced layer, the lower surface of the fiber reinforced layer is provided with a second corrugated medium paper layer, the lower surface of the second corrugated medium paper layer is connected with a surface paper layer, and the upper surface of the interior paper layer and the lower surface of the surface paper layer are coated with waterproof coatings.

Preferably, the longitudinal section of sandwich composite sheet upper surface and the longitudinal section of lower surface all are wavy, and sandwich composite sheet's upper surface is provided with a plurality of bellyings of going up, forms the depressed part between the adjacent bellyings of going up, the trough of first flute sandwich layer bonds with the depressed part that corresponds, sandwich composite sheet's lower surface is provided with a plurality of concave parts that correspond with the depressed part, the concave part bonds with the foam insulation layer down.

Preferably, an adhesive layer is arranged between two corrugated medium paper layers of the first corrugated medium paper layer.

More preferably, the flute shapes of the two layers of corrugated medium paper are both B flutes or C flutes, and the flute shapes of the two layers of corrugated medium paper are U-shaped.

Preferably, the foam heat-insulating layer is a polyurethane foam heat-insulating layer or a polystyrene foam heat-insulating layer, and the thickness of the foam heat-insulating layer is 0.2-0.8 mm.

Preferably, the fiber reinforced layer is a high-strength polyester industrial yarn reinforced layer, a perlite cotton reinforced layer or a glass fiber reinforced layer, and the thickness of the fiber reinforced layer is 0.2-0.6 mm.

Preferably, the corrugation direction of the second corrugated medium paper layer and the corrugation direction of the first corrugated medium paper layer are perpendicular to each other.

Preferably, the flute shape of the second corrugated medium paper layer is E-shaped.

Preferably, the thickness of the sandwich composite plate is 1-10 mm.

More preferably, the sandwich composite board is made by adopting a polyurethane foaming processing foam structure on a honeycomb paper core.

The utility model has the beneficial effects that: the composite corrugated paper disclosed by the utility model is reasonable in structure arrangement, external force can be dispersed through the arrangement of the bubble-shaped honeycomb sandwich composite board and the corrugated core paper layer, and the compression resistance and the buffer capacity of the composite corrugated paper are improved; the foam heat-insulation layer and the fiber reinforced layer play roles in heat insulation, heat insulation and flame retardance, and the composite corrugated paper is not easy to damp and soften due to the arrangement of the waterproof coating.

Drawings

FIG. 1 is a schematic cross-sectional view of composite corrugated paper of the present invention;

the reference signs are: 1-inner paper layer, 2-first corrugated medium paper layer, 3-sandwich composite board, 4-foam heat insulation layer, 5-fiber reinforced layer, 6-second corrugated medium paper layer, 7-surface paper layer, 8-upper convex part, 9-concave part and 10-lower concave part.

Detailed Description

For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and the accompanying fig. 1, and the description of the embodiments is not intended to limit the present invention.

Examples

As shown in fig. 1, the composite corrugated paper comprises an inner paper layer 1, wherein a first corrugated medium paper layer 2 is arranged on the lower surface of the inner paper layer 1, and the longitudinal section of the first corrugated medium paper layer 2 is wavy; the interior paper layer 1 is fixed with the crest bonding of first flute core paper layer 2, the lower surface of first flute core layer 2 is equipped with sandwich composite board 3, the trough of first flute core layer 2 and sandwich composite board 3's upper surface connection, sandwich composite board 3's lower surface is equipped with foam heat preservation 4, foam heat preservation 4's lower surface is equipped with fibre enhancement layer 5, fibre enhancement layer 5's lower surface is equipped with second flute core paper layer 6, second flute core paper layer 6's lower surface is connected with surface paper layer 7, the upper surface of interior paper layer 1 and surface paper layer 7's lower surface all have coated waterproof coating.

Preferably, the longitudinal section of 3 upper surfaces of sandwich composite board and the longitudinal section of lower surface all are wavy, and sandwich composite board 3's upper surface is provided with a plurality of bellying 8 of going up, forms depressed part 9 between the adjacent bellying 8 of going up, the trough of first flute sandwich layer 2 bonds with the depressed part 9 that corresponds, sandwich composite board 3's lower surface is provided with a plurality of lower concave parts 10 that correspond with depressed part 9, lower concave part 10 bonds with foam insulation layer 4.

Preferably, an adhesive layer is arranged between two pieces of corrugated medium paper in the first corrugated medium paper layer 2.

Preferably, the flute shapes of the two layers of corrugated medium paper are both B flutes or C flutes, and the flute shapes of the two layers of corrugated medium paper are U-shaped. In this embodiment, the flute type of two-layer flute core paper is C stupefied, and the stupefied volume of C is little and intensity is high, and the stupefied top of U-shaped flute is convex, and this stupefied shape has good elasticity and extensibility to it is big with the area of contact of the platform of sandwich composite sheet 3 upper surface, and the intensity through gluing agent bonding is higher, and both combinations can reach better buffering effect.

In this embodiment, the connected mode between each layer of compound corrugated paper is fixed by gluing agent bonding, the gluing agent is the polyvinyl acetate gluing agent, and bonding strength is high after this gluing agent solidification, and is difficult for sticking up the limit layering.

Preferably, the foam insulation layer 4 is a polyurethane foam insulation layer or a polystyrene foam insulation layer, and the thickness of the foam insulation layer 4 is 0.2-0.8 mm. In this embodiment, the foam insulation layer 4 is a polyurethane foam insulation layer, and the thickness of the foam insulation layer 4 is 0.4 mm. The polyurethane foam heat-insulating layer has good elasticity and compressive strength, has good heat-insulating effect, can obstruct the bidirectional heat transfer inside and outside the composite corrugated paper, and also plays a certain flame-retardant role.

Preferably, the fiber reinforced layer 5 is a high-strength polyester industrial yarn reinforced layer, a perlite cotton reinforced layer or a glass fiber reinforced layer, and the thickness of the fiber reinforced layer 5 is 0.2-0.6 mm. In this embodiment, fiber reinforcement layer 5 is the cotton reinforcing layer of pearlite, and this cotton reinforcing layer of pearlite has good thermal-insulated effect that keeps warm.

Preferably, the corrugation direction of the second corrugated medium paper layer 6 and the corrugation direction of the first corrugated medium paper layer 2 are perpendicular to each other. The flute direction of the first corrugated medium paper layer 2 and the second corrugated medium paper layer 6 which are mutually vertical can effectively enhance the compressive strength and stability of the whole composite corrugated paper.

Preferably, the flute shape of the second corrugated medium paper layer 6 is E-shaped. The E-shaped corrugated medium paper has the characteristics of thinness and hardness, and the E-shaped corrugated medium paper is arranged on the outer layer to enable the surface of the composite corrugated paper to be flat and not easy to wrinkle.

Preferably, the thickness of the sandwich composite plate 3 is 1-10 mm. In this embodiment, the sandwich composite panel 3 has a thickness of 6 mm.

More preferably, the sandwich composite board 3 is made by foaming polyurethane on the honeycomb paper core to form a foam structure, and the foam structure can enhance the contact and bonding stability of the first corrugated core paper layer 2 with the concave part 9 and the lower concave part 10 of the sandwich composite board 3.

The composite corrugated paper is compounded by multiple layers of materials, the composite corrugated paper has good waterproofness due to the arrangement of the inner and outer waterproof coatings, the heat preservation and insulation effect, the buffering capacity and the compressive strength of the composite corrugated paper are obviously improved due to the compounding effect of the two layers of corrugated medium paper, the sandwich composite board, the heat preservation foam layer and the fiber reinforced layer, and the corrugated paper box prepared by the composite corrugated paper can meet the requirements of most goods on the waterproof, heat preservation, insulation, compressive and buffering capacities of the corrugated paper box, and is wide in application range.

The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.

Claims

1. The utility model provides a compound corrugated paper which characterized in that: the corrugated paper comprises an inner paper layer, wherein a first corrugated medium paper layer is arranged on the lower surface of the inner paper layer, and the longitudinal section of the first corrugated medium paper layer is wavy; the wave crests of the inner paper layer and the first corrugated medium paper layer are bonded, a sandwich composite board is arranged on the lower surface of the first corrugated medium layer, and the wave troughs of the first corrugated medium layer are connected with the upper surface of the sandwich composite board; the lower surface of sandwich composite board is equipped with the foam heat preservation layer, the lower surface of foam heat preservation layer is equipped with the fibre enhancement layer, the lower surface of fibre enhancement layer is equipped with second corrugated core paper layer, the lower surface and the surface paper layer of second corrugated core paper layer are connected, the upper surface of lining paper layer and the lower surface of surface paper layer have all been coated with waterproof coating.

2. A composite corrugated paper as claimed in claim 1, wherein: the longitudinal section of sandwich composite sheet upper surface and the longitudinal section of lower surface all are wavy, and sandwich composite sheet's upper surface is provided with a plurality of bellyings of going up, forms the depressed part between the adjacent bellyings of going up, the trough of first flute sandwich layer bonds with the depressed part that corresponds, sandwich composite sheet's lower surface is provided with a plurality of lower concave parts that correspond with the depressed part, the concave part bonds with the foam insulation layer down.

3. A composite corrugated paper as claimed in claim 1, wherein: the first corrugated medium paper layer is formed by arranging an adhesive layer between two corrugated medium paper layers.

4. A composite corrugated paper as claimed in claim 3, wherein: the corrugated shapes of the two layers of corrugated medium paper are both B-shaped or C-shaped, and the corrugated shapes of the two layers of corrugated medium paper are U-shaped.

5. A composite corrugated paper as claimed in claim 1, wherein: the foam heat-insulating layer is a polyurethane foam heat-insulating layer or a polystyrene foam heat-insulating layer, and the thickness of the foam heat-insulating layer is 0.2-0.8 mm.

6. A composite corrugated paper as claimed in claim 1, wherein: the fiber reinforced layer is a high-strength polyester industrial yarn reinforced layer, a perlite cotton reinforced layer or a glass fiber reinforced layer, and the thickness of the fiber reinforced layer is 0.2-0.6 mm.

7. A composite corrugated paper as claimed in claim 1, wherein: the corrugation direction of the second corrugated medium paper layer is perpendicular to the corrugation direction of the first corrugated medium paper layer.

8. A composite corrugated paper as claimed in claim 1, wherein: the flute shape of the second corrugated medium paper layer is E-shaped.

9. A composite corrugated paper as claimed in claim 1, wherein: the thickness of the sandwich composite plate is 1-10 mm.